I am A- and my midwife wants to give me some kind of injection in my 28th week in case the baby has a positive RH factor. Is this necessary, or can I just wait until after the child is born? I do not want to give the baby anything that could comprimise his/her health.

When I gave birth to my daughter it was found that we have rhesus incompatibility too. I didn't hear anything about an injection before the birth, they just gave it to me within 12 hours of delivery. Maybe get a second opinion.

I am AB- and my doctor is giving me the injection at 28 weeks nd also within 72 hours after delivery. It is called Rhogam.
http://my.webmd.com/content/article/4/1680_51841?src=Inktomi&condition=Health_Topics_A-Z